/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/array-crafted/zero_sum_m5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 19:43:58,471 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 19:43:58,473 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 19:43:58,527 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 19:43:58,543 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 19:43:58,544 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 19:43:58,544 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 19:43:58,545 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 19:43:58,546 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 19:43:58,547 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 19:43:58,548 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 19:43:58,549 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 19:43:58,551 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 19:43:58,557 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 19:43:58,560 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 19:43:58,561 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 19:43:58,572 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 19:43:58,582 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 19:43:58,584 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 19:43:58,584 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 19:43:58,585 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-01-31 19:43:58,598 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 19:43:58,598 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 19:43:58,599 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 19:43:58,600 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 19:43:58,600 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 19:43:58,600 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 19:43:58,600 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 19:43:58,600 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 19:43:58,600 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 19:43:58,601 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 19:43:58,601 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 19:43:58,601 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 19:43:58,602 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 19:43:58,602 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 19:43:58,602 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 19:43:58,602 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 19:43:58,602 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 19:43:58,603 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 19:43:58,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 19:43:58,603 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 19:43:58,603 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 19:43:58,603 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 19:43:58,603 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 19:43:58,603 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 19:43:58,837 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 19:43:58,866 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 19:43:58,869 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 19:43:58,870 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 19:43:58,870 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 19:43:58,871 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_m5.c [2022-01-31 19:43:58,932 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45ba873e7/d51ef9529e3343f894638111fb1b4f2f/FLAG33321ba7f [2022-01-31 19:43:59,329 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 19:43:59,329 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_m5.c [2022-01-31 19:43:59,334 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45ba873e7/d51ef9529e3343f894638111fb1b4f2f/FLAG33321ba7f [2022-01-31 19:43:59,731 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45ba873e7/d51ef9529e3343f894638111fb1b4f2f [2022-01-31 19:43:59,733 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 19:43:59,734 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 19:43:59,735 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 19:43:59,736 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 19:43:59,738 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 19:43:59,739 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:43:59" (1/1) ... [2022-01-31 19:43:59,740 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1723df07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:43:59, skipping insertion in model container [2022-01-31 19:43:59,740 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:43:59" (1/1) ... [2022-01-31 19:43:59,746 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 19:43:59,762 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 19:43:59,906 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_m5.c[402,415] [2022-01-31 19:43:59,983 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 19:43:59,991 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 19:44:00,002 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_m5.c[402,415] [2022-01-31 19:44:00,029 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 19:44:00,043 INFO L208 MainTranslator]: Completed translation [2022-01-31 19:44:00,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:44:00 WrapperNode [2022-01-31 19:44:00,043 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 19:44:00,044 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 19:44:00,044 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 19:44:00,045 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 19:44:00,055 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:44:00" (1/1) ... [2022-01-31 19:44:00,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:44:00" (1/1) ... [2022-01-31 19:44:00,068 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:44:00" (1/1) ... [2022-01-31 19:44:00,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:44:00" (1/1) ... [2022-01-31 19:44:00,085 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:44:00" (1/1) ... [2022-01-31 19:44:00,090 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:44:00" (1/1) ... [2022-01-31 19:44:00,091 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:44:00" (1/1) ... [2022-01-31 19:44:00,093 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 19:44:00,093 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 19:44:00,094 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 19:44:00,094 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 19:44:00,099 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:44:00" (1/1) ... [2022-01-31 19:44:00,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 19:44:00,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 19:44:00,129 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 19:44:00,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 19:44:00,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 19:44:00,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 19:44:00,163 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 19:44:00,163 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 19:44:00,163 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 19:44:00,164 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 19:44:00,164 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 19:44:00,164 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 19:44:00,164 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 19:44:00,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 19:44:00,165 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 19:44:00,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 19:44:00,166 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-01-31 19:44:00,166 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 19:44:00,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 19:44:00,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 19:44:00,169 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 19:44:00,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 19:44:00,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 19:44:00,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 19:44:00,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 19:44:00,244 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 19:44:00,245 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 19:44:00,456 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 19:44:00,462 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 19:44:00,462 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2022-01-31 19:44:00,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:44:00 BoogieIcfgContainer [2022-01-31 19:44:00,464 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 19:44:00,465 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 19:44:00,465 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 19:44:00,469 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 19:44:00,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 07:43:59" (1/3) ... [2022-01-31 19:44:00,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@549cff33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:44:00, skipping insertion in model container [2022-01-31 19:44:00,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:44:00" (2/3) ... [2022-01-31 19:44:00,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@549cff33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:44:00, skipping insertion in model container [2022-01-31 19:44:00,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:44:00" (3/3) ... [2022-01-31 19:44:00,471 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_m5.c [2022-01-31 19:44:00,475 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 19:44:00,475 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 19:44:00,525 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 19:44:00,536 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=JORDAN [2022-01-31 19:44:00,536 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 19:44:00,554 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 45 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 19:44:00,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 19:44:00,576 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:44:00,576 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:44:00,577 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:44:00,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:44:00,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1538774170, now seen corresponding path program 1 times [2022-01-31 19:44:00,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:44:00,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [974773040] [2022-01-31 19:44:00,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:44:00,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:44:00,653 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:44:00,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:00,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:44:00,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:00,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:44:00,859 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:44:00,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [974773040] [2022-01-31 19:44:00,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [974773040] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:44:00,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:44:00,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 19:44:00,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335434588] [2022-01-31 19:44:00,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:44:00,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 19:44:00,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:44:00,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 19:44:00,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 19:44:00,898 INFO L87 Difference]: Start difference. First operand has 52 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 45 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:01,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:44:01,056 INFO L93 Difference]: Finished difference Result 97 states and 143 transitions. [2022-01-31 19:44:01,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 19:44:01,058 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-01-31 19:44:01,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:44:01,065 INFO L225 Difference]: With dead ends: 97 [2022-01-31 19:44:01,065 INFO L226 Difference]: Without dead ends: 46 [2022-01-31 19:44:01,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 19:44:01,070 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 6 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:44:01,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 95 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:44:01,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-31 19:44:01,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-01-31 19:44:01,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.275) internal successors, (51), 40 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:01,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2022-01-31 19:44:01,110 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 32 [2022-01-31 19:44:01,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:44:01,110 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2022-01-31 19:44:01,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:01,111 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2022-01-31 19:44:01,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 19:44:01,113 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:44:01,113 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:44:01,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 19:44:01,114 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:44:01,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:44:01,114 INFO L85 PathProgramCache]: Analyzing trace with hash -281038688, now seen corresponding path program 1 times [2022-01-31 19:44:01,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:44:01,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [841140115] [2022-01-31 19:44:01,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:44:01,136 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:44:01,136 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:44:01,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:44:01,142 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:44:01,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:01,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:44:01,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:01,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:44:01,237 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:44:01,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [841140115] [2022-01-31 19:44:01,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [841140115] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:44:01,238 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:44:01,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 19:44:01,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018637622] [2022-01-31 19:44:01,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:44:01,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 19:44:01,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:44:01,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 19:44:01,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 19:44:01,242 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:01,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:44:01,409 INFO L93 Difference]: Finished difference Result 97 states and 125 transitions. [2022-01-31 19:44:01,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 19:44:01,410 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-01-31 19:44:01,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:44:01,413 INFO L225 Difference]: With dead ends: 97 [2022-01-31 19:44:01,413 INFO L226 Difference]: Without dead ends: 65 [2022-01-31 19:44:01,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 19:44:01,418 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 67 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:44:01,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 29 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:44:01,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-31 19:44:01,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2022-01-31 19:44:01,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.22) internal successors, (61), 50 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:01,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2022-01-31 19:44:01,443 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 34 [2022-01-31 19:44:01,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:44:01,444 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2022-01-31 19:44:01,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:01,444 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2022-01-31 19:44:01,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 19:44:01,448 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:44:01,449 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:44:01,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 19:44:01,452 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:44:01,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:44:01,452 INFO L85 PathProgramCache]: Analyzing trace with hash -670903156, now seen corresponding path program 1 times [2022-01-31 19:44:01,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:44:01,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532644307] [2022-01-31 19:44:01,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:44:01,454 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:44:01,454 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:44:01,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:44:01,458 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:44:01,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:01,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:44:01,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:01,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:44:01,534 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:44:01,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532644307] [2022-01-31 19:44:01,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1532644307] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:44:01,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:44:01,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 19:44:01,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215792219] [2022-01-31 19:44:01,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:44:01,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 19:44:01,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:44:01,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 19:44:01,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 19:44:01,536 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:01,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:44:01,618 INFO L93 Difference]: Finished difference Result 102 states and 122 transitions. [2022-01-31 19:44:01,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 19:44:01,618 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-01-31 19:44:01,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:44:01,620 INFO L225 Difference]: With dead ends: 102 [2022-01-31 19:44:01,621 INFO L226 Difference]: Without dead ends: 57 [2022-01-31 19:44:01,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 19:44:01,627 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 5 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:44:01,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 79 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:44:01,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-31 19:44:01,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-01-31 19:44:01,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 52 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:01,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-01-31 19:44:01,640 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 54 [2022-01-31 19:44:01,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:44:01,640 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-01-31 19:44:01,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:01,640 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-01-31 19:44:01,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 19:44:01,641 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:44:01,641 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:44:01,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 19:44:01,642 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:44:01,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:44:01,642 INFO L85 PathProgramCache]: Analyzing trace with hash 308089514, now seen corresponding path program 2 times [2022-01-31 19:44:01,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:44:01,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115547810] [2022-01-31 19:44:01,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:44:01,646 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:44:01,646 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:44:01,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:44:01,647 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:44:01,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:01,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:44:01,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:01,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:44:01,782 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:44:01,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115547810] [2022-01-31 19:44:01,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2115547810] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:44:01,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:44:01,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 19:44:01,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769680204] [2022-01-31 19:44:01,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:44:01,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 19:44:01,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:44:01,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 19:44:01,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 19:44:01,784 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:01,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:44:01,987 INFO L93 Difference]: Finished difference Result 118 states and 146 transitions. [2022-01-31 19:44:01,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 19:44:01,988 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-01-31 19:44:01,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:44:01,991 INFO L225 Difference]: With dead ends: 118 [2022-01-31 19:44:01,991 INFO L226 Difference]: Without dead ends: 77 [2022-01-31 19:44:01,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-01-31 19:44:01,997 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 68 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:44:01,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 33 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:44:02,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-31 19:44:02,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-01-31 19:44:02,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.1527777777777777) internal successors, (83), 72 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:02,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2022-01-31 19:44:02,014 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 56 [2022-01-31 19:44:02,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:44:02,014 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2022-01-31 19:44:02,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:02,015 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2022-01-31 19:44:02,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 19:44:02,016 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:44:02,017 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:44:02,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 19:44:02,017 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:44:02,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:44:02,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1983085974, now seen corresponding path program 3 times [2022-01-31 19:44:02,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:44:02,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759641026] [2022-01-31 19:44:02,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:44:02,020 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:44:02,020 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:44:02,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:44:02,022 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:44:02,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:05,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:44:05,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:05,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:44:05,089 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:44:05,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [759641026] [2022-01-31 19:44:05,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [759641026] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:44:05,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:44:05,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 19:44:05,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150067285] [2022-01-31 19:44:05,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:44:05,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 19:44:05,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:44:05,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 19:44:05,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1876, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 19:44:05,092 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand has 45 states, 45 states have (on average 1.6) internal successors, (72), 43 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:06,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:44:06,542 INFO L93 Difference]: Finished difference Result 139 states and 158 transitions. [2022-01-31 19:44:06,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 19:44:06,543 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.6) internal successors, (72), 43 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-01-31 19:44:06,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:44:06,553 INFO L225 Difference]: With dead ends: 139 [2022-01-31 19:44:06,554 INFO L226 Difference]: Without dead ends: 134 [2022-01-31 19:44:06,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 8 SyntacticMatches, 8 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=114, Invalid=2048, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 19:44:06,555 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 27 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 2611 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 2629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:44:06,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 408 Invalid, 2629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2611 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 19:44:06,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-01-31 19:44:06,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 130. [2022-01-31 19:44:06,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.16) internal successors, (145), 125 states have internal predecessors, (145), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:06,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 149 transitions. [2022-01-31 19:44:06,586 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 149 transitions. Word has length 76 [2022-01-31 19:44:06,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:44:06,586 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 149 transitions. [2022-01-31 19:44:06,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.6) internal successors, (72), 43 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:06,587 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 149 transitions. [2022-01-31 19:44:06,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 19:44:06,592 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:44:06,593 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:44:06,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 19:44:06,593 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:44:06,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:44:06,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1296326476, now seen corresponding path program 4 times [2022-01-31 19:44:06,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:44:06,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829016097] [2022-01-31 19:44:06,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:44:06,596 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:44:06,596 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:44:06,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:44:06,597 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:44:06,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:06,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:44:06,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:06,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:44:06,705 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:44:06,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829016097] [2022-01-31 19:44:06,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [829016097] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:44:06,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:44:06,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 19:44:06,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162315491] [2022-01-31 19:44:06,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:44:06,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 19:44:06,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:44:06,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 19:44:06,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-31 19:44:06,707 INFO L87 Difference]: Start difference. First operand 130 states and 149 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:07,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:44:07,031 INFO L93 Difference]: Finished difference Result 254 states and 292 transitions. [2022-01-31 19:44:07,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 19:44:07,032 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-01-31 19:44:07,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:44:07,033 INFO L225 Difference]: With dead ends: 254 [2022-01-31 19:44:07,033 INFO L226 Difference]: Without dead ends: 133 [2022-01-31 19:44:07,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-01-31 19:44:07,034 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 95 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:44:07,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 123 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:44:07,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-01-31 19:44:07,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2022-01-31 19:44:07,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.1574803149606299) internal successors, (147), 127 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:07,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 151 transitions. [2022-01-31 19:44:07,059 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 151 transitions. Word has length 78 [2022-01-31 19:44:07,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:44:07,060 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 151 transitions. [2022-01-31 19:44:07,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:07,060 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 151 transitions. [2022-01-31 19:44:07,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 19:44:07,061 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:44:07,062 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:44:07,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 19:44:07,062 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:44:07,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:44:07,062 INFO L85 PathProgramCache]: Analyzing trace with hash 795141330, now seen corresponding path program 5 times [2022-01-31 19:44:07,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:44:07,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506780403] [2022-01-31 19:44:07,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:44:07,065 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:44:07,065 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:44:07,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:44:07,066 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:44:07,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:07,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:44:07,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:07,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:44:07,149 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:44:07,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506780403] [2022-01-31 19:44:07,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [506780403] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:44:07,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:44:07,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 19:44:07,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849171530] [2022-01-31 19:44:07,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:44:07,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 19:44:07,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:44:07,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 19:44:07,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-31 19:44:07,151 INFO L87 Difference]: Start difference. First operand 132 states and 151 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:07,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:44:07,398 INFO L93 Difference]: Finished difference Result 205 states and 241 transitions. [2022-01-31 19:44:07,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 19:44:07,398 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 19:44:07,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:44:07,399 INFO L225 Difference]: With dead ends: 205 [2022-01-31 19:44:07,399 INFO L226 Difference]: Without dead ends: 99 [2022-01-31 19:44:07,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-01-31 19:44:07,400 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 201 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:44:07,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 61 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:44:07,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-01-31 19:44:07,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-01-31 19:44:07,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.1170212765957446) internal successors, (105), 94 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:07,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2022-01-31 19:44:07,411 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 80 [2022-01-31 19:44:07,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:44:07,412 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2022-01-31 19:44:07,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:07,412 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2022-01-31 19:44:07,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-31 19:44:07,415 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:44:07,415 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:44:07,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 19:44:07,416 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:44:07,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:44:07,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1460511520, now seen corresponding path program 6 times [2022-01-31 19:44:07,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:44:07,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008138658] [2022-01-31 19:44:07,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:44:07,417 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:44:07,417 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:44:07,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:44:07,418 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:44:07,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:12,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:44:12,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:12,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:44:12,234 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:44:12,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008138658] [2022-01-31 19:44:12,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1008138658] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:44:12,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:44:12,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 19:44:12,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184815641] [2022-01-31 19:44:12,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:44:12,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 19:44:12,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:44:12,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 19:44:12,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=5088, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 19:44:12,237 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand has 74 states, 74 states have (on average 1.2702702702702702) internal successors, (94), 72 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:17,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:44:17,437 INFO L93 Difference]: Finished difference Result 188 states and 207 transitions. [2022-01-31 19:44:17,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 19:44:17,438 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.2702702702702702) internal successors, (94), 72 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2022-01-31 19:44:17,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:44:17,439 INFO L225 Difference]: With dead ends: 188 [2022-01-31 19:44:17,439 INFO L226 Difference]: Without dead ends: 183 [2022-01-31 19:44:17,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2131 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=661, Invalid=10681, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 19:44:17,442 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 23 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 4761 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 4933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 4761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:44:17,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 487 Invalid, 4933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 4761 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-31 19:44:17,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-01-31 19:44:17,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 168. [2022-01-31 19:44:17,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.1226993865030674) internal successors, (183), 163 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:17,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 187 transitions. [2022-01-31 19:44:17,470 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 187 transitions. Word has length 98 [2022-01-31 19:44:17,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:44:17,470 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 187 transitions. [2022-01-31 19:44:17,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.2702702702702702) internal successors, (94), 72 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:17,470 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 187 transitions. [2022-01-31 19:44:17,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-31 19:44:17,471 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:44:17,471 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:44:17,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 19:44:17,472 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:44:17,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:44:17,472 INFO L85 PathProgramCache]: Analyzing trace with hash -2146153538, now seen corresponding path program 7 times [2022-01-31 19:44:17,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:44:17,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184220196] [2022-01-31 19:44:17,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:44:17,474 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:44:17,474 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:44:17,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:44:17,475 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:44:17,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:17,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:44:17,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:17,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:44:17,558 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:44:17,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184220196] [2022-01-31 19:44:17,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [184220196] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:44:17,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:44:17,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 19:44:17,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988766512] [2022-01-31 19:44:17,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:44:17,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 19:44:17,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:44:17,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 19:44:17,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-31 19:44:17,560 INFO L87 Difference]: Start difference. First operand 168 states and 187 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:17,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:44:17,865 INFO L93 Difference]: Finished difference Result 330 states and 368 transitions. [2022-01-31 19:44:17,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 19:44:17,866 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2022-01-31 19:44:17,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:44:17,866 INFO L225 Difference]: With dead ends: 330 [2022-01-31 19:44:17,867 INFO L226 Difference]: Without dead ends: 171 [2022-01-31 19:44:17,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-01-31 19:44:17,868 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 130 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:44:17,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 112 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:44:17,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-01-31 19:44:17,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2022-01-31 19:44:17,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.121212121212121) internal successors, (185), 165 states have internal predecessors, (185), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:17,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 189 transitions. [2022-01-31 19:44:17,894 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 189 transitions. Word has length 100 [2022-01-31 19:44:17,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:44:17,894 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 189 transitions. [2022-01-31 19:44:17,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:17,894 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 189 transitions. [2022-01-31 19:44:17,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 19:44:17,895 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:44:17,895 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:44:17,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 19:44:17,895 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:44:17,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:44:17,896 INFO L85 PathProgramCache]: Analyzing trace with hash 109217116, now seen corresponding path program 8 times [2022-01-31 19:44:17,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:44:17,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125034554] [2022-01-31 19:44:17,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:44:17,898 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:44:17,898 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:44:17,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:44:17,899 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:44:17,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:17,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:44:17,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:17,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:44:17,988 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:44:17,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125034554] [2022-01-31 19:44:17,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1125034554] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:44:17,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:44:17,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 19:44:17,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891841908] [2022-01-31 19:44:17,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:44:17,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 19:44:17,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:44:17,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 19:44:17,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-31 19:44:17,990 INFO L87 Difference]: Start difference. First operand 170 states and 189 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:18,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:44:18,275 INFO L93 Difference]: Finished difference Result 259 states and 295 transitions. [2022-01-31 19:44:18,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 19:44:18,275 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 19:44:18,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:44:18,276 INFO L225 Difference]: With dead ends: 259 [2022-01-31 19:44:18,276 INFO L226 Difference]: Without dead ends: 121 [2022-01-31 19:44:18,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-01-31 19:44:18,277 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 242 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:44:18,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 65 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:44:18,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-01-31 19:44:18,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-01-31 19:44:18,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0948275862068966) internal successors, (127), 116 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:18,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 131 transitions. [2022-01-31 19:44:18,295 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 131 transitions. Word has length 102 [2022-01-31 19:44:18,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:44:18,295 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 131 transitions. [2022-01-31 19:44:18,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:18,295 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 131 transitions. [2022-01-31 19:44:18,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-01-31 19:44:18,296 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:44:18,296 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:44:18,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 19:44:18,297 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:44:18,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:44:18,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1874912554, now seen corresponding path program 9 times [2022-01-31 19:44:18,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:44:18,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286072700] [2022-01-31 19:44:18,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:44:18,299 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:44:18,299 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:44:18,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:44:18,300 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:44:18,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:26,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:44:26,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:26,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:44:26,026 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:44:26,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286072700] [2022-01-31 19:44:26,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1286072700] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:44:26,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:44:26,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 19:44:26,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096582012] [2022-01-31 19:44:26,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:44:26,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 19:44:26,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:44:26,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 19:44:26,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=9029, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 19:44:26,030 INFO L87 Difference]: Start difference. First operand 121 states and 131 transitions. Second operand has 98 states, 98 states have (on average 1.183673469387755) internal successors, (116), 96 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:48,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:44:48,086 INFO L93 Difference]: Finished difference Result 376 states and 411 transitions. [2022-01-31 19:44:48,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-01-31 19:44:48,087 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.183673469387755) internal successors, (116), 96 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 120 [2022-01-31 19:44:48,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:44:48,089 INFO L225 Difference]: With dead ends: 376 [2022-01-31 19:44:48,089 INFO L226 Difference]: Without dead ends: 370 [2022-01-31 19:44:48,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9436 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=2568, Invalid=36044, Unknown=0, NotChecked=0, Total=38612 [2022-01-31 19:44:48,096 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 313 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 13271 mSolverCounterSat, 1893 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 15164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1893 IncrementalHoareTripleChecker+Valid, 13271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:44:48,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 687 Invalid, 15164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1893 Valid, 13271 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2022-01-31 19:44:48,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-01-31 19:44:48,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 258. [2022-01-31 19:44:48,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 253 states have (on average 1.1027667984189724) internal successors, (279), 253 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:48,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 283 transitions. [2022-01-31 19:44:48,182 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 283 transitions. Word has length 120 [2022-01-31 19:44:48,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:44:48,183 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 283 transitions. [2022-01-31 19:44:48,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.183673469387755) internal successors, (116), 96 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:48,183 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 283 transitions. [2022-01-31 19:44:48,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-01-31 19:44:48,184 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:44:48,185 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:44:48,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 19:44:48,185 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:44:48,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:44:48,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1111510712, now seen corresponding path program 10 times [2022-01-31 19:44:48,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:44:48,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1445824609] [2022-01-31 19:44:48,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:44:48,187 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:44:48,187 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:44:48,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:44:48,188 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:44:48,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:48,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:44:48,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:48,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:44:48,311 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:44:48,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1445824609] [2022-01-31 19:44:48,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1445824609] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:44:48,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:44:48,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 19:44:48,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347563953] [2022-01-31 19:44:48,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:44:48,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 19:44:48,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:44:48,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 19:44:48,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-01-31 19:44:48,313 INFO L87 Difference]: Start difference. First operand 258 states and 283 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:48,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:44:48,708 INFO L93 Difference]: Finished difference Result 398 states and 436 transitions. [2022-01-31 19:44:48,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 19:44:48,709 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 122 [2022-01-31 19:44:48,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:44:48,710 INFO L225 Difference]: With dead ends: 398 [2022-01-31 19:44:48,710 INFO L226 Difference]: Without dead ends: 124 [2022-01-31 19:44:48,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-01-31 19:44:48,711 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 99 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:44:48,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 129 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:44:48,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-01-31 19:44:48,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2022-01-31 19:44:48,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0932203389830508) internal successors, (129), 118 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:48,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 133 transitions. [2022-01-31 19:44:48,737 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 133 transitions. Word has length 122 [2022-01-31 19:44:48,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:44:48,737 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 133 transitions. [2022-01-31 19:44:48,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:48,737 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 133 transitions. [2022-01-31 19:44:48,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-01-31 19:44:48,738 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:44:48,738 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:44:48,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 19:44:48,739 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:44:48,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:44:48,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1212163016, now seen corresponding path program 11 times [2022-01-31 19:44:48,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:44:48,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034996267] [2022-01-31 19:44:48,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:44:48,741 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:44:48,741 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:44:48,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:44:48,742 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:44:48,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:48,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:44:48,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:48,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:44:48,877 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:44:48,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034996267] [2022-01-31 19:44:48,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1034996267] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:44:48,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:44:48,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 19:44:48,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937559422] [2022-01-31 19:44:48,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:44:48,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 19:44:48,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:44:48,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 19:44:48,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-01-31 19:44:48,879 INFO L87 Difference]: Start difference. First operand 123 states and 133 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:49,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:44:49,233 INFO L93 Difference]: Finished difference Result 238 states and 266 transitions. [2022-01-31 19:44:49,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 19:44:49,233 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 122 [2022-01-31 19:44:49,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:44:49,234 INFO L225 Difference]: With dead ends: 238 [2022-01-31 19:44:49,234 INFO L226 Difference]: Without dead ends: 143 [2022-01-31 19:44:49,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2022-01-31 19:44:49,235 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 515 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 375 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 375 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:44:49,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 57 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [375 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:44:49,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-01-31 19:44:49,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-01-31 19:44:49,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.0797101449275361) internal successors, (149), 138 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:49,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 153 transitions. [2022-01-31 19:44:49,270 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 153 transitions. Word has length 122 [2022-01-31 19:44:49,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:44:49,270 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 153 transitions. [2022-01-31 19:44:49,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:49,271 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 153 transitions. [2022-01-31 19:44:49,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-01-31 19:44:49,272 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:44:49,272 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:44:49,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 19:44:49,272 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:44:49,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:44:49,272 INFO L85 PathProgramCache]: Analyzing trace with hash -234560588, now seen corresponding path program 12 times [2022-01-31 19:44:49,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:44:49,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1742361391] [2022-01-31 19:44:49,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:44:49,274 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:44:49,274 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:44:49,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:44:49,275 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:44:49,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:45:00,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:45:00,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:45:00,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:45:00,452 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:45:00,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1742361391] [2022-01-31 19:45:00,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1742361391] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:45:00,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:45:00,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-01-31 19:45:00,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255789483] [2022-01-31 19:45:00,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:45:00,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-01-31 19:45:00,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:45:00,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-01-31 19:45:00,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=531, Invalid=13041, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 19:45:00,454 INFO L87 Difference]: Start difference. First operand 143 states and 153 transitions. Second operand has 117 states, 117 states have (on average 1.1794871794871795) internal successors, (138), 115 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:45:28,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:45:28,664 INFO L93 Difference]: Finished difference Result 308 states and 333 transitions. [2022-01-31 19:45:28,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-01-31 19:45:28,664 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.1794871794871795) internal successors, (138), 115 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 142 [2022-01-31 19:45:28,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:45:28,665 INFO L225 Difference]: With dead ends: 308 [2022-01-31 19:45:28,666 INFO L226 Difference]: Without dead ends: 303 [2022-01-31 19:45:28,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11988 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=3013, Invalid=47837, Unknown=0, NotChecked=0, Total=50850 [2022-01-31 19:45:28,670 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 152 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 15414 mSolverCounterSat, 989 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 16403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 989 IncrementalHoareTripleChecker+Valid, 15414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:45:28,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 728 Invalid, 16403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [989 Valid, 15414 Invalid, 0 Unknown, 0 Unchecked, 9.7s Time] [2022-01-31 19:45:28,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-01-31 19:45:28,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 246. [2022-01-31 19:45:28,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 241 states have (on average 1.0871369294605808) internal successors, (262), 241 states have internal predecessors, (262), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:45:28,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 266 transitions. [2022-01-31 19:45:28,785 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 266 transitions. Word has length 142 [2022-01-31 19:45:28,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:45:28,785 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 266 transitions. [2022-01-31 19:45:28,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.1794871794871795) internal successors, (138), 115 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:45:28,785 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 266 transitions. [2022-01-31 19:45:28,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-01-31 19:45:28,786 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:45:28,786 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:45:28,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 19:45:28,787 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:45:28,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:45:28,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1090636462, now seen corresponding path program 13 times [2022-01-31 19:45:28,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:45:28,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767350034] [2022-01-31 19:45:28,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:45:28,789 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:45:28,789 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:45:28,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:45:28,790 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:45:28,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:45:28,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:45:28,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:45:28,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:45:28,921 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:45:28,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767350034] [2022-01-31 19:45:28,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [767350034] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:45:28,921 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:45:28,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 19:45:28,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28448241] [2022-01-31 19:45:28,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:45:28,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 19:45:28,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:45:28,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 19:45:28,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-01-31 19:45:28,923 INFO L87 Difference]: Start difference. First operand 246 states and 266 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:45:29,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:45:29,629 INFO L93 Difference]: Finished difference Result 549 states and 594 transitions. [2022-01-31 19:45:29,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 19:45:29,630 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 144 [2022-01-31 19:45:29,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:45:29,631 INFO L225 Difference]: With dead ends: 549 [2022-01-31 19:45:29,631 INFO L226 Difference]: Without dead ends: 249 [2022-01-31 19:45:29,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:45:29,632 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 109 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:45:29,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 135 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1007 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:45:29,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-01-31 19:45:29,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 248. [2022-01-31 19:45:29,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 243 states have (on average 1.0864197530864197) internal successors, (264), 243 states have internal predecessors, (264), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:45:29,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 268 transitions. [2022-01-31 19:45:29,738 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 268 transitions. Word has length 144 [2022-01-31 19:45:29,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:45:29,739 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 268 transitions. [2022-01-31 19:45:29,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:45:29,739 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 268 transitions. [2022-01-31 19:45:29,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-01-31 19:45:29,740 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:45:29,740 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:45:29,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 19:45:29,741 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:45:29,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:45:29,741 INFO L85 PathProgramCache]: Analyzing trace with hash 317913584, now seen corresponding path program 14 times [2022-01-31 19:45:29,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:45:29,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1754498217] [2022-01-31 19:45:29,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:45:29,743 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:45:29,743 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:45:29,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:45:29,744 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:45:29,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:45:29,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:45:29,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:45:29,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:45:29,886 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:45:29,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1754498217] [2022-01-31 19:45:29,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1754498217] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:45:29,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:45:29,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 19:45:29,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895750746] [2022-01-31 19:45:29,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:45:29,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 19:45:29,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:45:29,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 19:45:29,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-01-31 19:45:29,888 INFO L87 Difference]: Start difference. First operand 248 states and 268 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:45:30,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:45:30,399 INFO L93 Difference]: Finished difference Result 369 states and 406 transitions. [2022-01-31 19:45:30,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 19:45:30,399 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 146 [2022-01-31 19:45:30,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:45:30,400 INFO L225 Difference]: With dead ends: 369 [2022-01-31 19:45:30,400 INFO L226 Difference]: Without dead ends: 165 [2022-01-31 19:45:30,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=157, Invalid=395, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:45:30,401 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 466 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 355 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:45:30,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [466 Valid, 67 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [355 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:45:30,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-01-31 19:45:30,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-01-31 19:45:30,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.06875) internal successors, (171), 160 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:45:30,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 175 transitions. [2022-01-31 19:45:30,521 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 175 transitions. Word has length 146 [2022-01-31 19:45:30,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:45:30,521 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 175 transitions. [2022-01-31 19:45:30,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:45:30,522 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 175 transitions. [2022-01-31 19:45:30,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-01-31 19:45:30,523 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:45:30,523 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:45:30,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 19:45:30,523 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:45:30,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:45:30,524 INFO L85 PathProgramCache]: Analyzing trace with hash 907624126, now seen corresponding path program 15 times [2022-01-31 19:45:30,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:45:30,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [115053600] [2022-01-31 19:45:30,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:45:30,525 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:45:30,526 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:45:30,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:45:30,527 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:45:30,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:45:50,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:45:50,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:45:50,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:45:50,679 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:45:50,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [115053600] [2022-01-31 19:45:50,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [115053600] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:45:50,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:45:50,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2022-01-31 19:45:50,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082999150] [2022-01-31 19:45:50,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:45:50,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-01-31 19:45:50,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:45:50,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-01-31 19:45:50,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=18401, Unknown=0, NotChecked=0, Total=18906 [2022-01-31 19:45:50,682 INFO L87 Difference]: Start difference. First operand 165 states and 175 transitions. Second operand has 138 states, 138 states have (on average 1.1594202898550725) internal successors, (160), 136 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:14,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:14,546 INFO L93 Difference]: Finished difference Result 303 states and 322 transitions. [2022-01-31 19:46:14,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-01-31 19:46:14,546 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 1.1594202898550725) internal successors, (160), 136 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 164 [2022-01-31 19:46:14,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:14,549 INFO L225 Difference]: With dead ends: 303 [2022-01-31 19:46:14,549 INFO L226 Difference]: Without dead ends: 298 [2022-01-31 19:46:14,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8165 ImplicationChecksByTransitivity, 27.6s TimeCoverageRelationStatistics Valid=1172, Invalid=46134, Unknown=0, NotChecked=0, Total=47306 [2022-01-31 19:46:14,551 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 28 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 16527 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 16758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 16527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:14,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 832 Invalid, 16758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 16527 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2022-01-31 19:46:14,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-01-31 19:46:14,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 282. [2022-01-31 19:46:14,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 277 states have (on average 1.0722021660649819) internal successors, (297), 277 states have internal predecessors, (297), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:14,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 301 transitions. [2022-01-31 19:46:14,721 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 301 transitions. Word has length 164 [2022-01-31 19:46:14,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:14,721 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 301 transitions. [2022-01-31 19:46:14,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 1.1594202898550725) internal successors, (160), 136 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:14,724 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 301 transitions. [2022-01-31 19:46:14,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-01-31 19:46:14,725 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:14,725 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:14,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 19:46:14,725 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:14,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:14,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1726171172, now seen corresponding path program 16 times [2022-01-31 19:46:14,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:14,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874637686] [2022-01-31 19:46:14,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:14,728 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:14,728 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:14,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:14,729 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:14,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:14,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:14,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:14,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:46:14,891 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:14,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874637686] [2022-01-31 19:46:14,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1874637686] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:14,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:14,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 19:46:14,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665706026] [2022-01-31 19:46:14,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:14,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 19:46:14,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:14,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 19:46:14,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-01-31 19:46:14,892 INFO L87 Difference]: Start difference. First operand 282 states and 301 transitions. Second operand has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:15,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:15,805 INFO L93 Difference]: Finished difference Result 558 states and 596 transitions. [2022-01-31 19:46:15,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 19:46:15,805 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 166 [2022-01-31 19:46:15,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:15,806 INFO L225 Difference]: With dead ends: 558 [2022-01-31 19:46:15,806 INFO L226 Difference]: Without dead ends: 285 [2022-01-31 19:46:15,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=552, Unknown=0, NotChecked=0, Total=702 [2022-01-31 19:46:15,807 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 169 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:15,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 131 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 964 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:46:15,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-01-31 19:46:15,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 284. [2022-01-31 19:46:15,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 279 states have (on average 1.07168458781362) internal successors, (299), 279 states have internal predecessors, (299), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:15,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 303 transitions. [2022-01-31 19:46:15,989 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 303 transitions. Word has length 166 [2022-01-31 19:46:15,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:15,990 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 303 transitions. [2022-01-31 19:46:15,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:15,990 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 303 transitions. [2022-01-31 19:46:15,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-01-31 19:46:15,991 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:15,992 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:15,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 19:46:15,992 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:15,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:15,992 INFO L85 PathProgramCache]: Analyzing trace with hash -2113728006, now seen corresponding path program 17 times [2022-01-31 19:46:15,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:15,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083992682] [2022-01-31 19:46:15,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:15,994 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:15,994 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:15,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:15,995 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:16,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:16,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:16,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:16,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:46:16,169 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:16,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083992682] [2022-01-31 19:46:16,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2083992682] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:16,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:16,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 19:46:16,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109478672] [2022-01-31 19:46:16,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:16,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 19:46:16,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:16,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 19:46:16,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-01-31 19:46:16,171 INFO L87 Difference]: Start difference. First operand 284 states and 303 transitions. Second operand has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:16,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:16,728 INFO L93 Difference]: Finished difference Result 421 states and 457 transitions. [2022-01-31 19:46:16,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 19:46:16,728 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 168 [2022-01-31 19:46:16,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:16,729 INFO L225 Difference]: With dead ends: 421 [2022-01-31 19:46:16,729 INFO L226 Difference]: Without dead ends: 187 [2022-01-31 19:46:16,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2022-01-31 19:46:16,730 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 478 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 417 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 417 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:16,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [478 Valid, 65 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [417 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:46:16,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-01-31 19:46:16,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2022-01-31 19:46:16,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.0604395604395604) internal successors, (193), 182 states have internal predecessors, (193), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:16,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 197 transitions. [2022-01-31 19:46:16,844 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 197 transitions. Word has length 168 [2022-01-31 19:46:16,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:16,845 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 197 transitions. [2022-01-31 19:46:16,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:16,845 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 197 transitions. [2022-01-31 19:46:16,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-01-31 19:46:16,846 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:16,846 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:16,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 19:46:16,846 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:16,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:16,847 INFO L85 PathProgramCache]: Analyzing trace with hash 616928840, now seen corresponding path program 18 times [2022-01-31 19:46:16,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:16,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477159836] [2022-01-31 19:46:16,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:16,849 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:16,849 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:16,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:16,850 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:17,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:41,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:41,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:41,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:46:41,601 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:41,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477159836] [2022-01-31 19:46:41,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1477159836] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:41,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:41,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [161] imperfect sequences [] total 161 [2022-01-31 19:46:41,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320084688] [2022-01-31 19:46:41,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:41,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 161 states [2022-01-31 19:46:41,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:41,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2022-01-31 19:46:41,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=633, Invalid=25127, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 19:46:41,604 INFO L87 Difference]: Start difference. First operand 187 states and 197 transitions. Second operand has 161 states, 161 states have (on average 1.1304347826086956) internal successors, (182), 159 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:10,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:47:10,512 INFO L93 Difference]: Finished difference Result 343 states and 362 transitions. [2022-01-31 19:47:10,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2022-01-31 19:47:10,514 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 161 states have (on average 1.1304347826086956) internal successors, (182), 159 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 186 [2022-01-31 19:47:10,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:47:10,515 INFO L225 Difference]: With dead ends: 343 [2022-01-31 19:47:10,515 INFO L226 Difference]: Without dead ends: 338 [2022-01-31 19:47:10,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10021 ImplicationChecksByTransitivity, 35.1s TimeCoverageRelationStatistics Valid=1367, Invalid=59395, Unknown=0, NotChecked=0, Total=60762 [2022-01-31 19:47:10,519 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 28 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 20574 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 20857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 20574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:47:10,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 850 Invalid, 20857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 20574 Invalid, 0 Unknown, 0 Unchecked, 12.0s Time] [2022-01-31 19:47:10,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-01-31 19:47:10,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 320. [2022-01-31 19:47:10,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 315 states have (on average 1.0634920634920635) internal successors, (335), 315 states have internal predecessors, (335), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:10,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 339 transitions. [2022-01-31 19:47:10,723 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 339 transitions. Word has length 186 [2022-01-31 19:47:10,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:47:10,724 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 339 transitions. [2022-01-31 19:47:10,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 161 states, 161 states have (on average 1.1304347826086956) internal successors, (182), 159 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:10,724 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 339 transitions. [2022-01-31 19:47:10,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-01-31 19:47:10,725 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:47:10,726 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:47:10,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 19:47:10,726 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:47:10,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:47:10,726 INFO L85 PathProgramCache]: Analyzing trace with hash 2101548262, now seen corresponding path program 19 times [2022-01-31 19:47:10,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:47:10,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1412994091] [2022-01-31 19:47:10,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:47:10,728 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:47:10,728 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:47:10,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:47:10,729 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:47:10,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:10,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:47:10,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:10,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:47:10,912 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:47:10,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1412994091] [2022-01-31 19:47:10,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1412994091] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:47:10,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:47:10,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 19:47:10,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192962309] [2022-01-31 19:47:10,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:47:10,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 19:47:10,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:47:10,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 19:47:10,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-01-31 19:47:10,914 INFO L87 Difference]: Start difference. First operand 320 states and 339 transitions. Second operand has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:11,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:47:11,815 INFO L93 Difference]: Finished difference Result 634 states and 672 transitions. [2022-01-31 19:47:11,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 19:47:11,815 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 188 [2022-01-31 19:47:11,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:47:11,816 INFO L225 Difference]: With dead ends: 634 [2022-01-31 19:47:11,816 INFO L226 Difference]: Without dead ends: 323 [2022-01-31 19:47:11,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=685, Unknown=0, NotChecked=0, Total=870 [2022-01-31 19:47:11,817 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 179 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 1220 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:47:11,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 132 Invalid, 1376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1220 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:47:11,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-01-31 19:47:12,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 322. [2022-01-31 19:47:12,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 317 states have (on average 1.0630914826498423) internal successors, (337), 317 states have internal predecessors, (337), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:12,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 341 transitions. [2022-01-31 19:47:12,030 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 341 transitions. Word has length 188 [2022-01-31 19:47:12,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:47:12,030 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 341 transitions. [2022-01-31 19:47:12,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:12,031 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 341 transitions. [2022-01-31 19:47:12,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-01-31 19:47:12,032 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:47:12,032 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:47:12,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 19:47:12,032 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:47:12,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:47:12,033 INFO L85 PathProgramCache]: Analyzing trace with hash 928638084, now seen corresponding path program 20 times [2022-01-31 19:47:12,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:47:12,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [39206974] [2022-01-31 19:47:12,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:47:12,034 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:47:12,034 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:47:12,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:47:12,036 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:47:12,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:12,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:47:12,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:12,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:47:12,229 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:47:12,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [39206974] [2022-01-31 19:47:12,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [39206974] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:47:12,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:47:12,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 19:47:12,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827497896] [2022-01-31 19:47:12,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:47:12,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 19:47:12,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:47:12,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 19:47:12,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-01-31 19:47:12,231 INFO L87 Difference]: Start difference. First operand 322 states and 341 transitions. Second operand has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:12,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:47:12,916 INFO L93 Difference]: Finished difference Result 475 states and 511 transitions. [2022-01-31 19:47:12,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 19:47:12,917 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 190 [2022-01-31 19:47:12,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:47:12,918 INFO L225 Difference]: With dead ends: 475 [2022-01-31 19:47:12,918 INFO L226 Difference]: Without dead ends: 209 [2022-01-31 19:47:12,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2022-01-31 19:47:12,920 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 539 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 443 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 443 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:47:12,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 81 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [443 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:47:12,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-01-31 19:47:13,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2022-01-31 19:47:13,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.053921568627451) internal successors, (215), 204 states have internal predecessors, (215), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:13,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 219 transitions. [2022-01-31 19:47:13,065 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 219 transitions. Word has length 190 [2022-01-31 19:47:13,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:47:13,065 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 219 transitions. [2022-01-31 19:47:13,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:13,065 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 219 transitions. [2022-01-31 19:47:13,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-01-31 19:47:13,066 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:47:13,066 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:47:13,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 19:47:13,066 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:47:13,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:47:13,067 INFO L85 PathProgramCache]: Analyzing trace with hash 559516242, now seen corresponding path program 21 times [2022-01-31 19:47:13,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:47:13,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560796212] [2022-01-31 19:47:13,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:47:13,068 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:47:13,068 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:47:13,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:47:13,070 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:47:13,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:38,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:47:38,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:38,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:47:38,655 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:47:38,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560796212] [2022-01-31 19:47:38,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1560796212] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:47:38,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:47:38,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [183] imperfect sequences [] total 183 [2022-01-31 19:47:38,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576648836] [2022-01-31 19:47:38,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:47:38,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 183 states [2022-01-31 19:47:38,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:47:38,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 183 interpolants. [2022-01-31 19:47:38,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1421, Invalid=31885, Unknown=0, NotChecked=0, Total=33306 [2022-01-31 19:47:38,659 INFO L87 Difference]: Start difference. First operand 209 states and 219 transitions. Second operand has 183 states, 183 states have (on average 1.1147540983606556) internal successors, (204), 181 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:37,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:48:37,165 INFO L93 Difference]: Finished difference Result 573 states and 603 transitions. [2022-01-31 19:48:37,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 243 states. [2022-01-31 19:48:37,165 INFO L78 Accepts]: Start accepts. Automaton has has 183 states, 183 states have (on average 1.1147540983606556) internal successors, (204), 181 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 208 [2022-01-31 19:48:37,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:48:37,167 INFO L225 Difference]: With dead ends: 573 [2022-01-31 19:48:37,167 INFO L226 Difference]: Without dead ends: 567 [2022-01-31 19:48:37,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 338 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34366 ImplicationChecksByTransitivity, 53.6s TimeCoverageRelationStatistics Valid=5524, Invalid=109736, Unknown=0, NotChecked=0, Total=115260 [2022-01-31 19:48:37,172 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 244 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 36135 mSolverCounterSat, 1737 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 910 SdHoareTripleChecker+Invalid, 37872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1737 IncrementalHoareTripleChecker+Valid, 36135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:48:37,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 910 Invalid, 37872 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1737 Valid, 36135 Invalid, 0 Unknown, 0 Unchecked, 21.2s Time] [2022-01-31 19:48:37,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-01-31 19:48:37,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 450. [2022-01-31 19:48:37,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 445 states have (on average 1.0584269662921348) internal successors, (471), 445 states have internal predecessors, (471), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:37,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 475 transitions. [2022-01-31 19:48:37,645 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 475 transitions. Word has length 208 [2022-01-31 19:48:37,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:48:37,645 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 475 transitions. [2022-01-31 19:48:37,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 183 states, 183 states have (on average 1.1147540983606556) internal successors, (204), 181 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:37,645 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 475 transitions. [2022-01-31 19:48:37,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-01-31 19:48:37,647 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:48:37,647 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:48:37,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 19:48:37,647 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:48:37,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:48:37,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1807985776, now seen corresponding path program 22 times [2022-01-31 19:48:37,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:48:37,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152189714] [2022-01-31 19:48:37,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:48:37,649 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:48:37,649 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:48:37,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:48:37,651 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:48:37,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:48:37,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:48:37,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:48:37,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:48:37,886 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:48:37,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152189714] [2022-01-31 19:48:37,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [152189714] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:48:37,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:48:37,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 19:48:37,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088051954] [2022-01-31 19:48:37,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:48:37,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 19:48:37,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:48:37,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 19:48:37,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2022-01-31 19:48:37,888 INFO L87 Difference]: Start difference. First operand 450 states and 475 transitions. Second operand has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 21 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:38,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:48:38,943 INFO L93 Difference]: Finished difference Result 656 states and 691 transitions. [2022-01-31 19:48:38,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 19:48:38,943 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 21 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 210 [2022-01-31 19:48:38,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:48:38,944 INFO L225 Difference]: With dead ends: 656 [2022-01-31 19:48:38,944 INFO L226 Difference]: Without dead ends: 212 [2022-01-31 19:48:38,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=224, Invalid=832, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 19:48:38,945 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 157 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 1635 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 1783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:48:38,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 166 Invalid, 1783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1635 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:48:38,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-01-31 19:48:39,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 211. [2022-01-31 19:48:39,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.0533980582524272) internal successors, (217), 206 states have internal predecessors, (217), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:39,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 221 transitions. [2022-01-31 19:48:39,076 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 221 transitions. Word has length 210 [2022-01-31 19:48:39,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:48:39,076 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 221 transitions. [2022-01-31 19:48:39,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 21 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:39,076 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 221 transitions. [2022-01-31 19:48:39,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-01-31 19:48:39,077 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:48:39,077 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:48:39,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 19:48:39,077 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:48:39,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:48:39,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1767530224, now seen corresponding path program 23 times [2022-01-31 19:48:39,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:48:39,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969260504] [2022-01-31 19:48:39,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:48:39,079 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:48:39,079 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:48:39,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:48:39,080 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:48:39,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:48:39,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:48:39,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:48:39,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:48:39,308 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:48:39,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969260504] [2022-01-31 19:48:39,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1969260504] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:48:39,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:48:39,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 19:48:39,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359495973] [2022-01-31 19:48:39,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:48:39,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 19:48:39,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:48:39,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 19:48:39,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2022-01-31 19:48:39,310 INFO L87 Difference]: Start difference. First operand 211 states and 221 transitions. Second operand has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 21 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:40,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:48:40,028 INFO L93 Difference]: Finished difference Result 398 states and 426 transitions. [2022-01-31 19:48:40,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 19:48:40,028 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 21 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 210 [2022-01-31 19:48:40,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:48:40,030 INFO L225 Difference]: With dead ends: 398 [2022-01-31 19:48:40,031 INFO L226 Difference]: Without dead ends: 231 [2022-01-31 19:48:40,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=310, Invalid=746, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 19:48:40,031 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 616 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 521 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 521 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:48:40,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 77 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [521 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:48:40,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-01-31 19:48:40,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2022-01-31 19:48:40,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.0486725663716814) internal successors, (237), 226 states have internal predecessors, (237), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:40,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 241 transitions. [2022-01-31 19:48:40,198 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 241 transitions. Word has length 210 [2022-01-31 19:48:40,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:48:40,198 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 241 transitions. [2022-01-31 19:48:40,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 21 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:40,199 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 241 transitions. [2022-01-31 19:48:40,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-01-31 19:48:40,200 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:48:40,200 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:48:40,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 19:48:40,200 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:48:40,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:48:40,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1940699868, now seen corresponding path program 24 times [2022-01-31 19:48:40,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:48:40,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611929114] [2022-01-31 19:48:40,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:48:40,202 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:48:40,202 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:48:40,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:48:40,203 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:48:40,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:49:14,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:49:14,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:49:14,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:49:14,345 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:49:14,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611929114] [2022-01-31 19:49:14,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1611929114] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:49:14,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:49:14,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [201] imperfect sequences [] total 201 [2022-01-31 19:49:14,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822998787] [2022-01-31 19:49:14,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:49:14,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 201 states [2022-01-31 19:49:14,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:49:14,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 201 interpolants. [2022-01-31 19:49:14,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1718, Invalid=38482, Unknown=0, NotChecked=0, Total=40200 [2022-01-31 19:49:14,350 INFO L87 Difference]: Start difference. First operand 231 states and 241 transitions. Second operand has 201 states, 201 states have (on average 1.1243781094527363) internal successors, (226), 199 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:51:20,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:51:20,706 INFO L93 Difference]: Finished difference Result 630 states and 665 transitions. [2022-01-31 19:51:20,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 344 states. [2022-01-31 19:51:20,707 INFO L78 Accepts]: Start accepts. Automaton has has 201 states, 201 states have (on average 1.1243781094527363) internal successors, (226), 199 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 230 [2022-01-31 19:51:20,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:51:20,709 INFO L225 Difference]: With dead ends: 630 [2022-01-31 19:51:20,709 INFO L226 Difference]: Without dead ends: 624 [2022-01-31 19:51:20,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 480 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65922 ImplicationChecksByTransitivity, 113.6s TimeCoverageRelationStatistics Valid=15052, Invalid=216790, Unknown=0, NotChecked=0, Total=231842 [2022-01-31 19:51:20,717 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 225 mSDsluCounter, 1009 mSDsCounter, 0 mSdLazyCounter, 50715 mSolverCounterSat, 2826 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 53541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2826 IncrementalHoareTripleChecker+Valid, 50715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:51:20,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 1047 Invalid, 53541 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2826 Valid, 50715 Invalid, 0 Unknown, 0 Unchecked, 35.9s Time] [2022-01-31 19:51:20,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-01-31 19:51:21,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 398. [2022-01-31 19:51:21,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 393 states have (on average 1.0534351145038168) internal successors, (414), 393 states have internal predecessors, (414), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:51:21,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 418 transitions. [2022-01-31 19:51:21,133 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 418 transitions. Word has length 230 [2022-01-31 19:51:21,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:51:21,133 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 418 transitions. [2022-01-31 19:51:21,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 201 states, 201 states have (on average 1.1243781094527363) internal successors, (226), 199 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:51:21,134 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 418 transitions. [2022-01-31 19:51:21,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-01-31 19:51:21,135 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:51:21,135 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:51:21,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 19:51:21,136 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:51:21,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:51:21,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1980555898, now seen corresponding path program 25 times [2022-01-31 19:51:21,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:51:21,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863370628] [2022-01-31 19:51:21,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:51:21,138 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:51:21,138 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:51:21,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:51:21,139 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:51:21,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:51:21,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:51:21,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:51:21,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:51:21,439 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:51:21,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863370628] [2022-01-31 19:51:21,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1863370628] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:51:21,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:51:21,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 19:51:21,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518335711] [2022-01-31 19:51:21,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:51:21,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 19:51:21,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:51:21,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 19:51:21,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:51:21,440 INFO L87 Difference]: Start difference. First operand 398 states and 418 transitions. Second operand has 24 states, 24 states have (on average 3.5) internal successors, (84), 23 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:51:22,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:51:22,846 INFO L93 Difference]: Finished difference Result 893 states and 938 transitions. [2022-01-31 19:51:22,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 19:51:22,847 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.5) internal successors, (84), 23 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 232 [2022-01-31 19:51:22,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:51:22,849 INFO L225 Difference]: With dead ends: 893 [2022-01-31 19:51:22,849 INFO L226 Difference]: Without dead ends: 401 [2022-01-31 19:51:22,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=267, Invalid=993, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 19:51:22,850 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 185 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 1512 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 1698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 1512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:51:22,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 146 Invalid, 1698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 1512 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:51:22,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-01-31 19:51:23,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 400. [2022-01-31 19:51:23,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 395 states have (on average 1.0531645569620254) internal successors, (416), 395 states have internal predecessors, (416), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:51:23,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 420 transitions. [2022-01-31 19:51:23,279 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 420 transitions. Word has length 232 [2022-01-31 19:51:23,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:51:23,280 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 420 transitions. [2022-01-31 19:51:23,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.5) internal successors, (84), 23 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:51:23,280 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 420 transitions. [2022-01-31 19:51:23,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-01-31 19:51:23,281 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:51:23,282 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:51:23,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 19:51:23,282 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:51:23,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:51:23,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1403075864, now seen corresponding path program 26 times [2022-01-31 19:51:23,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:51:23,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421712285] [2022-01-31 19:51:23,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:51:23,284 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:51:23,284 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:51:23,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:51:23,285 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:51:23,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:51:23,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:51:23,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:51:23,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:51:23,526 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:51:23,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421712285] [2022-01-31 19:51:23,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [421712285] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:51:23,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:51:23,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 19:51:23,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124365185] [2022-01-31 19:51:23,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:51:23,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 19:51:23,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:51:23,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 19:51:23,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:51:23,527 INFO L87 Difference]: Start difference. First operand 400 states and 420 transitions. Second operand has 24 states, 24 states have (on average 3.5) internal successors, (84), 23 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:51:24,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:51:24,305 INFO L93 Difference]: Finished difference Result 585 states and 622 transitions. [2022-01-31 19:51:24,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 19:51:24,305 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.5) internal successors, (84), 23 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 234 [2022-01-31 19:51:24,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:51:24,306 INFO L225 Difference]: With dead ends: 585 [2022-01-31 19:51:24,306 INFO L226 Difference]: Without dead ends: 253 [2022-01-31 19:51:24,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=373, Invalid=887, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 19:51:24,308 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 431 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:51:24,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 83 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:51:24,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-01-31 19:51:24,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2022-01-31 19:51:24,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 248 states have (on average 1.0443548387096775) internal successors, (259), 248 states have internal predecessors, (259), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:51:24,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 263 transitions. [2022-01-31 19:51:24,587 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 263 transitions. Word has length 234 [2022-01-31 19:51:24,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:51:24,588 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 263 transitions. [2022-01-31 19:51:24,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.5) internal successors, (84), 23 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:51:24,588 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 263 transitions. [2022-01-31 19:51:24,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-01-31 19:51:24,589 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:51:24,589 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:51:24,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 19:51:24,589 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:51:24,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:51:24,590 INFO L85 PathProgramCache]: Analyzing trace with hash 840878054, now seen corresponding path program 27 times [2022-01-31 19:51:24,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:51:24,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245296544] [2022-01-31 19:51:24,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:51:24,592 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:51:24,592 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:51:24,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:51:24,593 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:51:25,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:52:12,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:52:12,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:52:12,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:52:12,205 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:52:12,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245296544] [2022-01-31 19:52:12,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [245296544] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:52:12,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:52:12,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [222] imperfect sequences [] total 222 [2022-01-31 19:52:12,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088981711] [2022-01-31 19:52:12,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:52:12,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 222 states [2022-01-31 19:52:12,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:52:12,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 222 interpolants. [2022-01-31 19:52:12,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1726, Invalid=47336, Unknown=0, NotChecked=0, Total=49062 [2022-01-31 19:52:12,210 INFO L87 Difference]: Start difference. First operand 253 states and 263 transitions. Second operand has 222 states, 222 states have (on average 1.117117117117117) internal successors, (248), 220 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:54:07,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:54:07,939 INFO L93 Difference]: Finished difference Result 786 states and 823 transitions. [2022-01-31 19:54:07,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 340 states. [2022-01-31 19:54:07,940 INFO L78 Accepts]: Start accepts. Automaton has has 222 states, 222 states have (on average 1.117117117117117) internal successors, (248), 220 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 252 [2022-01-31 19:54:07,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:54:07,942 INFO L225 Difference]: With dead ends: 786 [2022-01-31 19:54:07,942 INFO L226 Difference]: Without dead ends: 780 [2022-01-31 19:54:07,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 418 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48910 ImplicationChecksByTransitivity, 101.6s TimeCoverageRelationStatistics Valid=7944, Invalid=168036, Unknown=0, NotChecked=0, Total=175980 [2022-01-31 19:54:07,951 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 248 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 63292 mSolverCounterSat, 2370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 65662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2370 IncrementalHoareTripleChecker+Valid, 63292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:54:07,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 844 Invalid, 65662 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2370 Valid, 63292 Invalid, 0 Unknown, 0 Unchecked, 44.9s Time] [2022-01-31 19:54:07,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2022-01-31 19:54:08,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 546. [2022-01-31 19:54:08,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 541 states have (on average 1.0480591497227356) internal successors, (567), 541 states have internal predecessors, (567), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:54:08,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 571 transitions. [2022-01-31 19:54:08,712 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 571 transitions. Word has length 252 [2022-01-31 19:54:08,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:54:08,713 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 571 transitions. [2022-01-31 19:54:08,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 222 states, 222 states have (on average 1.117117117117117) internal successors, (248), 220 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:54:08,713 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 571 transitions. [2022-01-31 19:54:08,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-01-31 19:54:08,714 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:54:08,714 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:54:08,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 19:54:08,714 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:54:08,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:54:08,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1613747460, now seen corresponding path program 28 times [2022-01-31 19:54:08,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:54:08,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935666864] [2022-01-31 19:54:08,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:54:08,716 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:54:08,716 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:54:08,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:54:08,718 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:54:08,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:09,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:54:09,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:09,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:54:09,018 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:54:09,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935666864] [2022-01-31 19:54:09,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1935666864] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:54:09,019 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:54:09,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 19:54:09,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470118124] [2022-01-31 19:54:09,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:54:09,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 19:54:09,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:54:09,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 19:54:09,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2022-01-31 19:54:09,020 INFO L87 Difference]: Start difference. First operand 546 states and 571 transitions. Second operand has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 25 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:54:10,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:54:10,385 INFO L93 Difference]: Finished difference Result 842 states and 880 transitions. [2022-01-31 19:54:10,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 19:54:10,385 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 25 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 254 [2022-01-31 19:54:10,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:54:10,386 INFO L225 Difference]: With dead ends: 842 [2022-01-31 19:54:10,387 INFO L226 Difference]: Without dead ends: 256 [2022-01-31 19:54:10,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=314, Invalid=1168, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 19:54:10,389 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 195 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 1456 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 1456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:54:10,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 122 Invalid, 1643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 1456 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:54:10,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-01-31 19:54:10,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 255. [2022-01-31 19:54:10,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 250 states have (on average 1.044) internal successors, (261), 250 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:54:10,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 265 transitions. [2022-01-31 19:54:10,746 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 265 transitions. Word has length 254 [2022-01-31 19:54:10,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:54:10,746 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 265 transitions. [2022-01-31 19:54:10,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 25 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:54:10,746 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 265 transitions. [2022-01-31 19:54:10,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-01-31 19:54:10,747 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:54:10,747 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:54:10,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 19:54:10,748 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:54:10,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:54:10,748 INFO L85 PathProgramCache]: Analyzing trace with hash 174696324, now seen corresponding path program 29 times [2022-01-31 19:54:10,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:54:10,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589846573] [2022-01-31 19:54:10,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:54:10,750 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:54:10,750 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:54:10,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:54:10,751 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:54:10,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:11,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:54:11,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:11,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:54:11,040 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:54:11,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589846573] [2022-01-31 19:54:11,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1589846573] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:54:11,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:54:11,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 19:54:11,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879258261] [2022-01-31 19:54:11,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:54:11,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 19:54:11,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:54:11,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 19:54:11,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2022-01-31 19:54:11,041 INFO L87 Difference]: Start difference. First operand 255 states and 265 transitions. Second operand has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 25 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:54:11,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:54:11,957 INFO L93 Difference]: Finished difference Result 478 states and 506 transitions. [2022-01-31 19:54:11,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 19:54:11,958 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 25 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 254 [2022-01-31 19:54:11,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:54:11,958 INFO L225 Difference]: With dead ends: 478 [2022-01-31 19:54:11,959 INFO L226 Difference]: Without dead ends: 275 [2022-01-31 19:54:11,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=442, Invalid=1040, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 19:54:11,960 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 869 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 755 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 869 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 755 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:54:11,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [869 Valid, 71 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [755 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:54:11,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-01-31 19:54:12,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2022-01-31 19:54:12,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 270 states have (on average 1.0407407407407407) internal successors, (281), 270 states have internal predecessors, (281), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:54:12,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 285 transitions. [2022-01-31 19:54:12,280 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 285 transitions. Word has length 254 [2022-01-31 19:54:12,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:54:12,280 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 285 transitions. [2022-01-31 19:54:12,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 25 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:54:12,281 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 285 transitions. [2022-01-31 19:54:12,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-01-31 19:54:12,282 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:54:12,282 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:54:12,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 19:54:12,282 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:54:12,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:54:12,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1416146576, now seen corresponding path program 30 times [2022-01-31 19:54:12,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:54:12,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767316502] [2022-01-31 19:54:12,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:54:12,284 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:54:12,285 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:54:12,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:54:12,286 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:54:13,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:12,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:55:12,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:12,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:55:12,938 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:55:12,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767316502] [2022-01-31 19:55:12,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1767316502] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:55:12,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:55:12,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [243] imperfect sequences [] total 243 [2022-01-31 19:55:12,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209514423] [2022-01-31 19:55:12,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:55:12,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 243 states [2022-01-31 19:55:12,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:55:12,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 243 interpolants. [2022-01-31 19:55:12,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1900, Invalid=56906, Unknown=0, NotChecked=0, Total=58806 [2022-01-31 19:55:12,943 INFO L87 Difference]: Start difference. First operand 275 states and 285 transitions. Second operand has 243 states, 243 states have (on average 1.1111111111111112) internal successors, (270), 241 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)